Rim mounting



Aug. 11, 1931;

A. S. VAN HALTEREN Patented Aug. 11, 1931 UNITED STATES PATENT *ol-"Fics ANDREW s. VAN HALTEREN, or EAST LANSING,l MICHIGAN, AssiGNoR, BY MEsNEA ASSIGNMENTS, To MOTORJ WHEEL conroRATioN, or LANSING, MTCHIGAN, A con- PORATION OF MICHIGAN RTM MouNTiNe Application filed February 14, 1927. Serial No. 167,878.

The present invention relates to the assembly of a demountable tire-carrying rim upon the fixed rim or felly of a vehicle wheel. The invention has for its principal objects the ready mounting and demounting of the rim, the securing of a firm placement of the rim under initial lateral and ultimate radial stress, the adaptinoof a narrow felly to the accommodation of rims of greater width,

economy of material and ease of manufacture.

To the accomplishing of this purpose, the invention involves distinctive features of construction, and cooperation in the rim-se- 1'5 curing member and those portions of the felly and rim upon which it bears, as will be hereinafter more fully disclosed.

To facilitate an understanding of the invention, embodiments of the saine'in connec- 213 tion with rims of diverse type are, in the accompanaying drawings, set forth by way of illustration and as a basis for a more detailed description of such exemplary embodiments.

In the drawings:

Fig. l is a transverse section through a fixed and demountable rim assembly includi ing a rim of the interiorly ribbed type; and

F ig. 2 is a similar section of an assembly including a rim of the semi-drop base type.

no distinctive feature of the present invention, is of the type comprising a bottom 11 and side walls 12 and 13, the wall 12 having its margin obliquely arranged to form a rear rim seat while the wall 13 is of less height,

both walls being apertured to accommodate clamping bolts 14 headed at 15, and threaded to receive the nut 16.

The rim 17 is a straight side type having side tire-retaining beads 18 and 19 and interiorly arranged ribs 20 and 21, the former arranged to have a wedge bearing upon the rim seat of the felly wall 12 for supporting the rim at the rear, while the latter clears the wall 13 of the felly. The front face of the rib 21 forms, in conjunction with the inner side of the rim, a forwardly and inwardly facing concave bearing surface as indicated at 22.

outer'extremityof said lug.

Having reference to Fig. 1 of the drawi ings, the fixed rim or felly, forming of itself The rim positioning and securing mem- .ber which may be in the form'of a plurality of lugs 23 or in the form of an annulus, is

provided with a rearwardly flaring slot, be-

ing substantially circular at the front face 'f of the 'lug'and -substantially elongated at its rear face, the width vof the slot being sub- 4stantially uniform throughoutf ySuch construction of the rim-securing member permits of a rocking of the same on the bolt in a radial i' plane of the wheel, and thus Aenables the said member to adjust itself to the. bearing surfaces on the rim and on the felly.

' In the preferred form of construction, the

junctionbetween the Walls 11j and 13 of the felly is such as to provide at 24 a forwardly and outwardly convex bearing surface adapted to enter and form a rolling fulcrum bearing for the bearing Surface on the rear face of the inner extremity of the- 'lug 23, while thel concave bearing surface 22 on th-e rim receives and lcooperates With the convex face. of the As the nut 16'is screwed home'uponth'e bol orstud 14, the initial effect is to push the rim 17 tothe rear and position the same upon its rear seat. -Such position of the rimhaving been attained, its resistance to further lateral movement causes the outer convex bearing face of thelug to ride upon the concave, bear-iv ing surface of the rib 21 and thus force the rim radially outward. The action of the lug on the rib 21 and the coactionof the Arib 2O upon the voblique surface oft-he felly wall j12 Vis to radially stress the rim and thus secure and maintain a firm placement of the rim on the felly. 4The action between the respective convex and'concave bearing surfaces of the lug and rim `and felly, cooperate with the perdrawings,1the felly Vor fixed rim and the bolt* are substantially the same as previously illustrated and described. The rim positioning and securing member here represented is of the same cross section as that previously il` lustrated and described, but is shown as a sec-Tm" missible rocking movement of the lug upon'@ tion 25 of an annulus with the flaring walls of the slot shown in full lines at 26.

The rim 27 is of the semi-drop base type, wherein the drop base provides at the real the inclined portion 28 for cooperation and seating upon 1the oblique narg'inof fthe fel'ly wall l2,l while at the front the incline 29,Y talring the place of the rib 21 of F ig. l, provides with the under face of the rim base proper a 'forwardly and inwardly facing concave bearing surface 30 lfor engagement by and cooperation with the convex outer extremity of the rim-securing member 35. As before described, a concave bearing surface on the inner extremity of the member 25 receives `andcooperates with the convex bearing sur face 24fofthe felly to form a rolling fulcrum.

The' operation and functioning ofthe .parts `afrefthe same in this form of construction as ""'20 :infthat previously'described.

It will "be -observed that lasplit clamping r-ingsuchas that which is usually used in con- "nectionfwith'ftheribbed-type of rim for inter- 25 l`jposition llletn'feen thefrim-securinglug and the face -Yo fthe f rib `i's ldispensed with, rendering .rfpossiblefthe'employment of a rimbfgreater -widthwitha fe'lly of a-Igiven size. Similarly vit will be observed, by reference to Fig. 2, l tliatthe employment ofthis construction in connection with a rim of the drop-base type enables the employment `of a wide rim with an exceptionally narrow telly.

I claim: In a rim mounting, the combination with a -ix'ed rim or velly 'providing a rear rim seat and at its front a forwardly and outwardly facing convex bearing surface, and a demountable rim adapt-ed `to seat atthe rear 'on the elly and having at its front a forwardly "'40 and inwardly 'facing concave bearing surface,

of a 'rim positioning and securing member "having adjacent its inner extremity a concave 'bearing surface and at its outer extremity a convex bearing surface for engagement respe'ctively with the bearing surfaces of the felly `and rim, the inner concave bearing sur- "ace'being on a Hatter arc than the cooperat- --ing `convex bearing surface, said rim positioning and securing member provided with a "transverse tapering slot, and a bolt member connecting with the felly and lying in the *slot'and vhaving an adjustable bearing on the rim-securing member at the smaller end of `4the tapering slot to'rock the 'said member in a radial wheel plane while progressively forcing the rim to the rear and radially for positioning and tightening the same.

In testimony vwhereof I have hereunto signed my name.

5 ANDREW S. VAN HALTEREN. 

